Mud pump



Dec. 10, 1929.

w. v. SEIFERT MUD PUMP Filed Sept. 3, 1926 2 Sheets-Sheet l 1 N VEN TOR.

Dec. 10, 1929. -w. v. SEIFERT MUD PUMP 2 Sheets-Shet Filed Sept. 3, 1926lllll 1 III? H IYNVENTOR.

A TTORNEY.

Patented Dec. 10, 1929 1,739,096

om-Tao. STATES PATENT! OFFICE.

wILLIAH V. SEIFERT, 01 DENVER, COLOR ADO I MUD PUMP Application filedSeptember a, 1926. Serial No. 138,485.

This invention relates to pumps and its delivery. Each unit comprises ahorizontal prima object is to provide a lifting pump cylinder 5connected at its ends with two verparticu arly adapted for drawing muddytical displacement chambers 6 formed ad liquids from wells and othersources. It is a joiningly in the housing of the pump, with 6distinctive feature of the invention that the their lower ends incommunication with the 56 turbid liquid passes through the pump with-vingress-opening 7 and the egress-opening 8 out coming in contact withany part of the of the same. I operating mechanism. Each displacementchamber has two ports Another feature of the invention resides in 9 and10 separated by a series'of check valves 10 the provision-of checkvalves which by the 12, the construction of which will hereinafter 60absence of sliding parts are not affected by he described. The lowerport 10 of each disthe abrasive action of grit and sand carriedplacement chamber is connected with the inby the liquid drawn throughthe valves, and gress-opening by a passage 13 and when, as in stillanother aim of the invention is to prothe construction shown in thedrawings, the

vide in a pump of the above described characpump comprises two units,the four displace- 65 ter floating pistons which separate the liquidment chambers open into the one passage as from the operating mechanismof the pump shown in Figure 6. The ports 9 of the disand areinstrumental in drawing the liquid placement chambers above the valves.12, are from its source and impelling it to the point connected by ducts14 with a passage 15in the of discharge. 1 upper portion of the pumphousing, which 7 Other objects of the invention reside in decommunicates with the egress-opening by a tails of construction andnovel arrangements downwardly extending duct 16 as best shown andcombinations of parts as will be fully disin Figure 5. closed in thecourse of the following descrip- .The connection between the ducts andthe tion passage is controlled by check-valves 17 sim- In theaccompanying drawings, in the sevilar in construction to those whichcontrol the eral views of which like parts are similarly connectionbetween the lower ends of the dis designated by numerical referencecharacters, placement chambers and the ingress opening. I

Figure 1; represents a partially sectional The four displacementchambers of the du- 30 plan view of the pump, plexconstructionillustrated in the drawings,

Figure 2, a vertical section taken on the have their respective ports 6in connection line 2-2 in Figure 1, with one and the same passage 15which as v Figure 3, an enlarged sectional view of one stated beforecommunicates with the single ofthe floating pistons of the pumpmechaegress-opening 8. I 35 nism, in its displacement chamber, Pistons18 fitted forreciprocation in the Figure 4, an end-elevation of thepump, cylinders 5 of the two pump-units, are faslooking in the directionof the arrow A in tened to rods 19 which extend through stufling Figure1, boxes 20, for their connection with sliding Figure 5, a verticaltransverse section in the cross heads 21, The cross'heads are cylindri-40 planes indicated by the line 3-3 in Figure 2, cal and move incorrespondingly formed slide Figure 6, a horizontal section along theways 22 which at their ends connect with the line 6-6 Figure 4, andheads of the respective cylinders 5 and with Figure 7, an enlarged andfragmentary seca crank-case 23. N tional view of one of the check-valveswhich A shaft 24 mounted in bearings 25' in the 45 control the passageof displaced liquid to and crank case 23 has two crank disks 26 thewrists from the pump. of which are connected with the cross-heads Thepump illustrated in the drawings comof the two pump units by means ofrods 27. prises two units which operate in unison to The shaft carriesbetween its bearings, aworm draw the liquid from its source in alternatewheel 28 which meshes with a worm 29 like- 50 movements and impel it toa common point of wise enclosed in the crank-case. The worm is mountedat theend of a shaft 30. extending through a packed opening of the crankcase and connected by a coupling 31 with the rotor of an electric motor32 which for convenience may be supported on the base 33' of the pumphousing. a

Y The displacement chambers are lined with bushings 34 for thereciprocating movement of floating istons 35. These istons arepreferably made, as illustrated in Figure 3, of two hollowcylindrical'boxes 36 provided with central tubular openings for theirconnection by coupling bolts 37. Clamped between the boxes is a disk 38of felt or other suitable material and at opposite sides of this diskare leather cups 39 which extend around the boxes for engagement withthe bushings of the displacement chambers. The felt disk and the leathercups cooperate to maintain the pistons in fluid-tight contact with thewalls of the displacement chambers, while permitting of the upward anddownward movement of the pistons in the operation of the pump.

The check-valves 12 and 17 .hereinbefore referred to may be of anysuitable construction but I prefer for the purpose of the presentinvention, the form and arrangement illustrated in the drawings. f

Each valve-element in each of the displacement chambers or in each ofthe dischargeducts. is composed of a number of concentric membersseparated from each other by circular partitions 40. The lower portionsof the partitions are beveled to provide the valve-seats 47.

The valve-members are each composed of an annular sack 41 of leather orother suitable material containing a body of mercury 42 and fastened bymeans of bolts 43 upon a metal retaining, ring 44. A rubber band 45 in arecess at the upper edge of the ring aids in maintaining a fluid-tightcontact with the valve seat when the valve is in its closed position,and metal washers 46 which if so desired may be replaced by a continuousstrap, are placed inside the bag for engage ment with the heads of thebolts.

The upper' portion of the bags is of ample fulness to permit of itscontraction by suction in the displacement chambers. When thiscontractiontakes place the sides of the bags are drawn away from thebeveled valveseats 47 and the lower portion is lifted sufliciently topermit of the passage of the liquid.

After the suction is discontinued and the valves are subjected topressure, the leather bags are under the influence of the weight oftheir mercury contents, pressed back against the valve-seats with littleor no sliding movement and the weight of the mercury together with thefluid pressure above the valves, maintains a fluid-tight contact of thevalves with their respective seats. It will benoted that by eliminatingsliding movement of the valves, their wear by grit or sand in thedisplaced liquid is reduced to the minimum, it 7 being understood thatthe slight up and downward movement of the lower portion of the valve isnegligible and that whatever wear may be caused by such movement on themetal retaining ring, does not affect the w atertight condition of thevalve, which is entirely dependent on the contact of the sides 2; thebag with the converging annular seats In the operation of the pump, thecylinderof each unit and the spaces of the respective displacementchambers above the floatpistons are filled with a fluid body preferablyoil or other similar substance and the crank case and the cylindricalslide ways connected therewith are likewise supplied with oil for thepurpose of lubrication.

tial vacuum which causesthe float-piston in the other displacementchamber to be drawn upwardly. The upward movement of the last mentionedfloat piston-opens the checkvalves at the lower end of the respectivedisplacement chamber with the result that the liquid in the sourceconnected with the ingress opening is drawn through said opening intothe passage 13 and thence through the port 10 into the displacementchamber where it follows the movement of the piston 35.

In the other displacement chambers which hag previously been filled withthe liquid dr wn" through the ingress opening while the piston in thepump cylinder moved in the opposite direction, the liquid is forceddownwardly past the closed valves 12 and through the ports 6 whence itpasses into the respective ducts 14 and through the respective valve 17into the passage 15 from where it is delivered to the egress-opening.

It will thus be apparent that in the operation of the pump onedisplacement chamber muddy waters from wells and other sources ofsupply.

The provision of contracting valves which engage their seat with littleor no sliding motion as hereinbefore explained adds to the life of thepump and permits of its operation during an extensive period of timewithout repair or replacement of parts.

It is to be understood that the pump as shown and described is subjectto variations in details of construction and in the arrangement of itsparts Without departing from the spirit or scope of the invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. In a pump having an ingress port and an egressport, a cylinder, a piston in the cylinder, a displacement cylinderconnected with the first-mentioned cylinder, the displacement cylinderbeing in connection with the ingress and egress ports of the pump, afloating piston in the displacement cylinder, a fluid body between thefirst-mentioned piston and the floating piston, and a check valve in thedisplacement cylinder, controlling the flow of liquid through theingress port.

2. In a pump having an ingress port and an egress port, a cylinder, apiston in the cylinder, a displacement cylinder connected with thefirst-mentioned cylinder, the displacement cylinder being in connectionwith the ingress and egress ports of the pum and having a normallyclosed opening at t e bottom thereof, a floating piston in thedisplacement cylinder, a fluid body between the firstmentioned pistonand the floating piston, and a check-valve in the displacement cylindercontrolling the flow of liquid through the ingress port.

3. In a pump having an ingress port and an egress port, a cylinder, aiston in the cylinder, a displacement cylin er connected with thefirst-mentioned cylinder, the dis lacement cylinder being in connectionwith t e ingress and egress ports of the pum and having a normallyclosed opening at t e bottom thereof, a floating piston in thedisplacement cylinder, a fluid body between the first-mentioned pistonand the floating piston, and a check-valve unit in the displacementcylinder controlling the flow of liquid through the ingress port, thefloating piston and checkvalve unit being remova le through saidopening.

4. In a pump having an ingress port and an egress port, a cylinder, apiston in the cylinder, a displacement cylinder connected with thefirst-mentioned cylinder, the displacement cylinder being in connectionwith the ingress and egress ports of the pump, a reciprocating means inthe displacement cylinder adapted to follow the movements of the piston,a fluid between the piston and the reciprocating means, and a valvecontrolling the ingress port and comprising a housing having a valveseat tapering to a reduced opening and a check valve on the seatcontrolling the flow through the reduced openmg.

5. In a pump having an ingress port and an egress port, a cylinder, apiston in the cylinder, a displacement cylinder connected with thefirst-mentioned cylinder, the displacement cylinder being in connectionwith the ingress and egress ports of the pump, a reciprocating means inthe displacement cylinder adapted to follow the movements of the piston,a fluid body between the piston and the reciprocating means, thedisplacement cylinder having a normally closed opening, a valvecontrolling the ingress port and comprising a housing having a valveseat tapering to a reduced opening and a check valve on the seatcontrolling the flow through the reduced opening, the valve housing andvalve being removable through said opening.

In testimony whereof I have afiixed my signature.

WILLIAM V. SEIFERT.

